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Astron. Astrophys. 334, 71-86 (1998)


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An X-ray analysis of the cD cluster Abell 2199

Hassan Siddiqui 1, 2, G.C. Stewart 2 and R.M. Johnstone 3

1 ESTEC, Astrophysics Division, Space Science Department, Postbus 299, 2200 AG Noordwijk, The Netherlands (hsiddiqu@astro.estec.esa.nl)
2 Department of Physics and Astronomy, University of Leicester, University Road, Leicester LE1 7RH, UK
3 Institute of Astronomy, Madingley Road, Cambridge CB3 OHA, UK

Received 1 October 1997 / Accepted 22 January 1998

Abstract

We describe the ROSAT analysis of the cD cluster Abell 2199 . The spatial distribution is found to be slightly elongated, with an axis ratio of [FORMULA] and position angle of [FORMULA] degrees anticlockwise from due North about the cluster centre. The surface brightness profile reveals a significant cooling flow of [FORMULA], although a lower mass deposition rate is deduced from the spectral data. The total gas and gravitational masses within a radius of 1.8 Mpc are found to be [FORMULA] and [FORMULA] respectively. The implications of these findings are discussed.

Key words: galaxies: clusters: individual: A 2199 – cooling flows – inter-galactic medium – dark matter – X-rays: galaxies – cosmology: observations

Send offprint requests to: H. Siddiqui

© European Southern Observatory (ESO) 1998

Online publication: May 12, 1998

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